Grinding-machine.



1. DE KONING & S.'O. LIVINGSTON.

GRINDING MACHINE.

APPLICATION mm MAY [9, 1911.

1,293,0453, Patented Feb. 4, 1919.

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UNITED STATES PATENT OFFICE.

JACOB DE KONIN'G AND SAMUEL 0. LIVINGSTON, 0F GRAND RAPIDS, MICHIGAN.

GRINDING-MACHINE.

Specification of Letters Patent.

Patented Feb. 4, 1919.

Application filed May 19, 1917. Serial No. 169,792.

To all whom it may concern:

Be it known that we, JAooB DE KONING and SAMUEL O. LIVINGSTON, citizens of the United States, residing at Grand Rapids, in the county of Kent and State of Michigan, have invented certain new and useful Improvements in Grinding-Machines, of which the following is a specification.

Our invention relates to improvements in appliances for sharpening twist drills, and like mechanical tools, and its objects are: first, to provide a means in connection with grinding machines of this class, whereby the uneven spots or ridges in the surface of the grinding wheel may be readily trued, or ground out without the necessity of removing the tool holding arm from the machine; second, to provide a means whereby the truing tool, or the tool with which the surface of the wheel is made smooth may be readily moved out of the way of the arm, or of the tool the machine is grinding, and, third, to provide a means whereby the wheel trimming tool may {be readily advanced toward the wheel, or withdrawn from the wheel, and may be turned to present different points to the wheel as desired.

We attain these objects by the mechanism and construction shown in the accompanying drawing, in which Figure 1 is a front elevation of a grinding machine with the tool supporting arm removed to more plainly show the position and operation of the facing machine. Fig. 2 is a side elevation of the same with the bonnet that covers the wheel cutaway to plainly show the operation of the grinding Or facing point upon the surface of the wheel. Fig. 8 is a sectional elevation of the facing tool holder showing the manner of adjusting the tool. Fig. 4 is a plan of the bolt that holds the facing tool arm in place, or upon which the facing tool arm is mounted.

Similar reference characters refer to similar parts throughout the several views.

In the accompanying drawing 1 represents the standard upon which the grinding wheel is mounted, 2 is the shaft, pin or arm upon which the tool supporting arm is mounted, 3 represents the grinding wheel, and f represents the bonnet or guard over the grinding wheel.

To carry out our invention we make a hole longitudinally through the hub upon which the bonnet 4 is mounted, and fit a pin, 7 so that it will enter said hole closely.

We then pass this pin through the hole e in the hub 01 of the tool carrying arm 5 and into the hole in the hub 6, and secure the pin in place by means of a set screw 8, or other suitable device, so the head or arm 5 may be swung freely from side to side to carry the point 6 of the facing tool 10 crosswise over the face of the grinding wheel.

At the inner end of the arm 5 we make an integral head a that is bored longitudinally for the reception of the grinding tool holder 9, the body of which is screw threaded, as at a, and is made to incline upwardly from the horizontal as it approaches the surface of the wheel, so it may be screwed gradually through the hole in the head 0 to carry the point 6, of the facing tool 10 into, or out of contact with the surface of the grinding wheel. This facing tool is designed to be permanently secured to the grinding frame or standard and when not in use for facing the grinding wheel it is swung downward into the position indicated by its dotted lines in Fig. 1, the tool 10 being first drawn away from the surface of the grinding wheel by properly manipulating the tool holder 9.

Any available means may be used for holding the tool 10 in proper and firm position in the holder 9. In this instance we have shown a set screw 11 that is to be screwed against the surface of the tool 10 to hold it in place.

The point, I), of the tool 10 may be made of any available material, as black diamonds, which are preferable, or any other material that will cut the grinding wheel successfully. The point I) of the facing tool 10 should be made separate from the tool, or interchangeable, so that if one point is destroyed it may be replaced without great trouble or expense.

Any available means may be employed to hold the tool holder 9 from turning, or revolving when in use carrying a tool, 10, while facing off a wheel. In this instance we have shown a set screw, 11, screwed into the tool holding end of the arm. When using a set screw for this purpose it is necessary to provide some means to avert the danger of marring the screw threads on the body of the tool holder, and for this purpose we have shown a small plate, 7, between the end of the screw and the surface of the tool holder.

lar head integral With said arm and made to incline upwardly as it approaches the Wheel, the inner surface of said head screw threaded, and a tool holder having its outer surface screw threaded and made longitudinally adjustable in the head.

Signed at Grand Rapids, Michigan, May

JACOB DE KONING. SAMUEL o. LIVINGSTON.

What We claim as new, and desire to secure by Letters Patent of the United States, is:

In a truing machine for emery grinding 5 Wheels, a main tool carrying arm, a pin temporarily anchored to the machine to one side of, and above the anchor point of the main tool carrying arm, a tool carrying arm pivotally mounted upon said pin and arranged 10 for oscillatory movement thereon, an annu- Copies of this patent may be obtained for five cents each, by addressing the commissioner of Patents, Washington, D. G. 

